OSDOCS-17623:Update Google Cloud firewall prereqs.

Author: AedinC

modules/osd-gcp-psc-firewall-prerequisites.adoc

@@ -8,11 +8,6 @@
 
 If you are using a firewall to control egress traffic from {product-title} on {GCP}, you must configure your firewall to grant access to certain domains and port combinations listed in the tables below. {product-title} requires this access to provide a fully managed OpenShift service.
 
-[IMPORTANT]
-====
-Only {product-title} on {GCP} clusters deployed with Private Service Connect can use a firewall to control egress traffic.
-====
-
 // .Prerequisites
 // Per SMEs, no prereqs. Will confirm with QE when ticket is reviewed.
 
@@ -70,10 +65,6 @@ Only {product-title} on {GCP} clusters deployed with Private Service Connect can
 |443
 |Required. Allows interactions between the cluster and {cluster-manager-first} to enable functionality, such as scheduling upgrades.
 
-|`sso.redhat.com`
-|443
-|The `https://console.redhat.com/openshift` site uses authentication from `sso.redhat.com`.
-
 |`catalog.redhat.com`
 |443
 |The `registry.access.redhat.com` and `https://registry.redhat.io` sites redirect through `catalog.redhat.com`.